2023-12-04
11:52 |
ttbar differential and inclusive measurements
/ Walter, David (CERN)
/ATLAS and CMS Collaborations
This report summarizes recent results of inclusive and differential tt cross section measurements from the ATLAS and CMS Collaborations at the LHC. Measurements at sqrt(s) = 7, 8, 13, and 13.6 TeV are compared to state-of-the-art theory predictions, using different PDF sets, matrix element calculations, or parton shower models. [...]
CMS-CR-2023-292.-
Geneva : CERN, 2023 - 7 p.
Fulltext: PDF;
In : 16th International Workshop on Top Quark Physics, Traverse City, Michigan, Us, 24 - 29 Sep 2023
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2023-12-04
11:52 |
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2023-12-04
11:52 |
Serial powering characterisation for the CMS Inner Tracker at the High Luminosity LHC
/ Ceccarelli, Rudy (INFN, Florence)
The CMS tracking system will be completely replaced in order to operate in the extreme conditions of the High Luminosity LHC.
The new tracker will consist of two main subdetectors:
the Inner Tracker, containing pixel modules, and the Outer Tracker, consisting of strip and macro-pixel modules.
In the Inner Tracker, silicon sensors will be read out by the CMS Readout Chip (CROC).
The chip, built in 65 nm CMOS technology, is able to withstand high radiation doses (500\,Mrad) and hit rates (3\,$\mathrm{GHz/cm^2}$ on the innermost tracking layer) during operation.
Moreover, it must handle a finer sensor granularity (2500\,$\mu\mathrm{m^2}$ pixels) and operate at low detection thresholds (1000\,$\mathrm{e^-}$).
The Inner Tracker will make use of the serial powering scheme to provide the $\sim60\,\mathrm{kW}$ required by $\sim4000$ modular units.
The Shunt-LDO (SLDO) regulator is the part of the CROC responsible for providing the power by draining a constant current in time, independently of the chip power consumption.
Tests performed with Single Chip Cards (SCC) in serial configurations are reported in this paper..
CMS-CR-2023-280.-
Geneva : CERN, 2023 - 9 p.
Fulltext: PDF;
In : 16th Topical Seminar on Innovative Particle and Radiation Detectors, Siena, It, 25 - 29 Sep 2023
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2023-12-04
11:52 |
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2023-12-04
11:50 |
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2023-11-27
17:28 |
[YSF] Search for extra Higgs bosons through same-sign top-quark production in association with an extra jet
/ HSU, Ting-hsiang (Taiwan, Natl. Taiwan U.)
/CMS Collaboration
A search is presented for new Higgs bosons, targeting proton-proton (pp) collision events with a same-sign top quark pair associated with an extra jet via the processes pp$\rightarrow$tH/A$\rightarrow$tt$\bar{\text{c}}$ and pp$\rightarrow$tH/A$\rightarrow$tt$\bar{\text{u}}$, where H and A represent exotic scalar and pseudoscalar bosons, respectively. The study is based on data collected at a center-of-mass energy of 13 TeV with the CMS detector at LHC Run 2, corresponding to an integrated luminosity of 138 $\text{fb}^{-1}$. [...]
CMS-CR-2023-296.-
Geneva : CERN, 2023 - 9 p.
Fulltext: PDF;
In : 16th International Workshop on Top Quark Physics, Traverse City, Michigan, Us, 24 - 29 Sep 2023
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2023-11-27
17:28 |
Test and performance of the CMS ECAL barrel data conversion and digital processing ASIC for HL-LHC
/ Borca, Cecilia (INFN, Turin ; Turin U.)
/CMS Collaboration
In preparation for the high luminosity upgrade of the Large Hadron Collider, a new data conversion and digital processing ASIC, called LiTE-DTU, was designed. Implemented in a 65 nm CMOS technology, the LiTE-DTU features two 12-bit 160 MS s$^{-1}$ successive approximation register time-interleaved ADCs, a data processing unit and enables efficient data transmission at 1.28 Gbps.
The LiTE-DTU has undergone extensive testing in both laboratory and beam tests, demonstrating excellent performance in the pre-production version, showing the production readiness of the design. [...]
CMS-CR-2023-278.-
Geneva : CERN, 2023 - 9 p.
Fulltext: PDF;
In : 16th Topical Seminar on Innovative Particle and Radiation Detectors, Siena, It, 25 - 29 Sep 2023
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2023-11-27
17:28 |
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2023-11-27
17:28 |
Measurement of the ttbar cross-section and ttbarZ cross-section ratio in pp collisions at a centre-of-mass energy of 13.6 TeV with the ATLAS and CMS experiments
/ Ranken, Evan Altair (DESY)
/ATLAS and CMS Collaborations
Recent measurements of the inclusive ttbar production cross section, sigma_ttbar, and the ratio of ttbar to Z boson production, R_ttbar/Z, are presented by the CMS and ATLAS collaboration using data collected from proton-proton collisions at the new LHC operating energy of sqrt(s)=13.6 TeV. These are among the first results of the ongoing LHC Run 3 data-taking period, which began in 2022, and provide a first opportunity to measure changes in key physics observables following the increase in energy. [...]
CMS-CR-2023-269.-
Geneva : CERN, 2023 - 10 p.
Fulltext: PDF;
In : 2023 European Physical Society Conference on High Energy Physics (EPS-HEP2023), Hamburg, Germany, 20 - 25 Aug 2023
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2023-11-22
09:11 |
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